From: rostedt@goodmis.org (Steven Rostedt)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/2] arm64: implement FTRACE_WITH_REGS
Date: Fri, 8 Jul 2016 11:57:10 -0400 [thread overview]
Message-ID: <20160708115710.5c657b5f@gandalf.local.home> (raw)
In-Reply-To: <20160708154824.ikq45dgk2auigqn7@treble>
On Fri, 8 Jul 2016 10:48:24 -0500
Josh Poimboeuf <jpoimboe@redhat.com> wrote:
> My understanding is that other arches don't need this check because they
> use -mfentry, so they have to modify the "call fentry" instruction to a
> nop on startup.
>
> Here, with -fprolog-pad, it's already a nop, so no change is needed.
>
That's what I was thinking. But as I stated in another email (probably
in the air when you wrote this), the call to ftrace_modify_code() may be
completely circumvented by ftrace_make_nop() if the addr is MCOUNT_ADDR.
-- Steve
next prev parent reply other threads:[~2016-07-08 15:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-27 15:15 [PATCH v2 0/2] arm64 live patching Torsten Duwe
2016-06-27 15:17 ` [PATCH v2 1/2] arm64: implement FTRACE_WITH_REGS Torsten Duwe
2016-07-01 12:53 ` Josh Poimboeuf
2016-07-04 9:18 ` Torsten Duwe
2016-07-03 5:17 ` kbuild test robot
2016-07-08 14:58 ` Petr Mladek
2016-07-08 15:07 ` Torsten Duwe
2016-07-08 15:24 ` Petr Mladek
2016-07-08 15:48 ` Josh Poimboeuf
2016-07-08 15:57 ` Steven Rostedt [this message]
2016-07-08 20:24 ` Torsten Duwe
2016-07-08 21:08 ` Steven Rostedt
2016-07-09 9:06 ` Torsten Duwe
2016-07-15 18:36 ` Steven Rostedt
2016-07-08 15:49 ` Steven Rostedt
2016-06-27 15:17 ` [PATCH v2 2/2] arm64: implement live patching Torsten Duwe
2016-07-11 14:03 ` Miroslav Benes
2016-07-11 21:58 ` Jessica Yu
2016-07-12 9:47 ` Miroslav Benes
2016-07-13 0:11 ` [PATCH] arm64: take SHN_LIVEPATCH syms into account when calculating plt_max_entries Jessica Yu
2016-08-17 9:38 ` Miroslav Benes
2016-08-11 16:46 ` [PATCH v2 2/2] arm64: implement live patching Torsten Duwe
2016-07-15 16:03 ` Paul Gortmaker
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